Telephone signal-relay.



E. L. BUKER TELEPHONE SIGNAL RELAY. APPLICATION FILED MAY 26. 19 l7.

Patented Sept. 17,1918.

INVENTOR M A TTOH/VEYS #vsauarmrs 840M WITNESSES UNITED STATES PATENT OFFICE.

I EARL LEROY BUKER, OF BUTTE, MONTANA.

TELEPHONE SIGNAL-RELAY.

Specification of Letters Patent. Patented Sept. 1'7, 1918.

Application filed May 26, 1917. Serial No. 171,125.

To all whom it may concern:

Be it known that I, EARL LEROY BUKER, a citizen of the United States, and a resident of Butte, in the county of Silver Bow and State of Montana, have made certain new and useful Improvements in Telephone Signal Relays, of which the following is a specification.

My invention relates to improvements in telephone signal relays and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a relay which will close a local circuit in which may be installed any suitable audible signaling device, which may be heard above the noise of the locality in which it is positioned.

A further object of my invention is to provide'a device of the type described which will keep the local circuit closed, and which will not cause a vibratory'movement of the contacts of the local circuit.

A further object of my invention is t provide a relay of the type described which is suitable for high tension lines, being composed of parts that are so well insulated that they" will stand high voltages.

Other objects and advantages-will appear in the following specification, andthe novel features of the invention, will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawing forming part of this appli cation, in which I Figure 1 is a face view of the device.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is a section on the line 33 of Fig. 1, showing the auxiliary circuit closed, and,

Fig. 4 is a view similar to Fig. 3, showing the auxiliary circuit open.

In carrying out my invention I provide an insulating block 1 which is preferably of slate or similar material. Mounted upon this block is a U-shaped bracket 2 having pivot pins 3 for an armature 4. The magnet coils 5 are held in a frame 6, which is;

secured to the base. Extending into the upper part of the base is a threaded sleeve 7 this sleeve being held by a screw 8, which is counter sunk, as shown in Fig. 2, at one end and by a nut 8.

A set screw 9 is threaded into the upper part of the sleeve 7, and passes through the armature 4. Nuts 10 are prov ded for ad justing the position of the screw 9. The

screw 9 serves only as a stop limiting the movements forward and backward of the armature 4. The glass tube 11 is a lever which is really a part of the armature 4, and with it is fulcrumed at the pivot pins 3. The armature movement is adjusted as to position by the members 8 and 8, and is adjusted as to amount of movement by the screw 9 and nut 10. The armature supports a glass tube 11. On the other side of the armature is an extension 12, to which is secured a spring 13, the opposite end of the spring being secured to a standard 14" so as to exert tension on the lever 11. The latter is limited in movement bythe screw 9 and bears normally on a spring contact 14, which tends to keep it out of engagement with a contact 15 carried by a spring 16, as shown in Fig. 4.

Binding posts 172 17", 17 and 17 are provided for making the proper connections. While the drawing illustrates the relay in a horizontal position, the insulated base 1 is adapted to be secured to a wall so that the relay stands in a vertical position with the magnet coils 5 at the bottom. The reason for applying the relay in the vertical position, is to overcome the force of gravity far as'possiblein acting upon the armature. Thus, the force opposing the action of the magnet 5, lies solely in the spring 13 'which may have a very light ad uStment, permitting the relay to operate on very feeble currents.

From the foregoing description of the various parts of the, device, the operation thereof may be readily understood.

The magnet 5 is on the main ringing circuit, this circuit being connected to the binding posts 17 a and 17 while the binding posts 17 and 17 are in a local or auxiliary circuit, of which the contacts 14 and 16 form a part. When the ringing circuit is energized the magnets 5 pull up the armature, thereby raising the lever 11 oil from the contact 14, and permitting it to engage the contact 15, and to closethe auxiliary or local circuit. As ringing continues the armature 4 may chatter due to the low rate of alternation of the ringing circuit. This, however, will not affect the local circuit because of the fact that the chattering armature merely causes the vibratory movement ofthe lever 11, which is out of contact with the spring 14, and hence does not interfere at all with the engagement of the spring contact 14 with the contact 15. In other words, the contacts 14 and 15 are positively closed as long as the ringing continues. Any sort of an audible signal such as an electric bell, an electric horn or whistle may be toperated by the local circuit, this signal being shown diagramatically at S, and serving to attract attention even though considerable noise takes place at the time the telephone signal is sent in.

The fact that the parts are well insulated makes the device available for use on lines which are near high power lines, and hence which may be at times subjected to heavy voltages; such voltages, however, will not affect the relay in the least.

I claim 1. A telephone relay comprising a pair of spring contacts, a lever for engaging one of the contacts to normally hold it away from its companion contact, a spring for exerting tension on the lever, a magnet, and an armature for the magnet connected with said lever for moving the latter away from the spring contact, whereby the two spring contacts are brought into engagement.

2. A telephone relay comprising an insulating base, a standard carried by the base, a spring secured to said standard, a magnet secured upon the base, an armature for the magnet, said armature being pivotally mounted on said base, an extension onone side of said armature arranged to be engaged by said spring, a lever carried by said armature on the other side, a pair of spring contacts arranged for normal engagement, one of said contacts engaged by said lever and held out of engagement with its companion contact, the energization of said magnet causing said armature to move said lever out of engagement with its spring contact, thereby permitting the closing of the two spring, contacts.-

3. A telephone relay comprising an insulating base adapted to be mounted vertically, a magnet, a pivoted armature arranged to be acted on by the magnet, a spring acting on the armature to move it from the magnet core, contacts, and an insulating lever car ried by the armature in normal engagement with .one of the contacts to keep them separated.

4. A telephone relay comprising an insulating base adapted to be mounted vertically, a magnet, an armature pivoted to vibrate in a vertical plane and acted on by the magnet, said armature acting independently of gravity, a spring engaging the armature holding it away from the magnet core, adjustable stops for arranging the zone of vibration of the armature, auxiliary circuit contacts mounted on said base, and an insulating lever carried by the armature engaging one of the contacts to keep them separated while the magnet is deenergized.

5. In a telephone relay, a magnet, a base having an opening beneath the magnet, an armature support, an armature pivoted in the support, disposed for vibration in a vertical plane beneaththe magnet, a sleeve insaid opening for adjusting the zone of vibration of the armature, and movable members carried by said sleeve for adjusting the amplitude of vibration of said armature.

EARL LEROY BUKER.

Witnesses:

A. D. SHo'rr, FRANK 'LUsHnR.

Copies of thin patent may be obtained for live cent: each, by addressing the lcommhlloner of htentl,

' Washington, D. .63 a 

